This is Yuri Gagarin as portrayed in the BBC Docudrama Space Race. This was a co production between British, German, American and Russian production teams which is interesting because me and blog watcher; DeadSpiderEye are not at all convince by the helmets. He has suggested that this is in fact a redressed helmet from the BBC's Star Cops (1987) and it might just be.
And this is the Alan Shepard look-a-likey in his not especially look-a-likey helmet and suit. I don't know from where it came but you some how expect better of the BBC
Cheers for pointing me towards this, DeadSpiderEye.